Nitrogen and oxygen tailoring of a solid carbon active site for two-electron selectivity electrocatalysis

Abstract

Synthesis of hydrogen peroxide (H2O2) via two-electron (2e-) oxygen reduction reaction (ORR) electrocatalysis has garnered extensive attentions as an appealing green and safe production technology. However, the key progress is...

Oxygenated P/N co-doped carbon for efficient 2e−oxygen reduction to H2O2

“…The above results conclusively signify that O–P/N–C900 can produce H 2 O 2 at high current densities at a large scale. In addition, very high faradaic efficiencies (FEs) of 85% to 95% were achieved in a potential range of 0.1 to 0.3 V, which is higher than most reported values, 40,54,58–66 as compared in Fig. 4D.…”

Porous heterostructure of graphene/hexagonal boron nitride as an efficient electrocatalyst for hydrogen peroxide generation

“…To compare H 2 O 2 selectivity and catalytic activity, the performance of previously reported electrocatalysts is summarized in Figure 3E,F. In the range of 0.45–0.75 V versus RHE (Figure 3E), the BN‐C‐1 exhibits 86%–95% H 2 O 2 selectivity, significantly superior to most of the reported electrocatalysts including atomic‐level tuning Co–N–C catalysts, (Co–N–C, below 80% selectivity 3 ), Fe atomically dispersed on carbon nanotubes (CNTs) (Fe–C–O, ~80%–92% selectivity 36 ), atomic Co dispersed on N‐doped carbon (Co–N x –C, ~75%–85% selectivity 37 ), boron nitride island‐doped carbon (BN–C, ~82%–87% selectivity 12 ), oxidized CNTs (O–CNTs, ~90% selectivity 9 ), B‐rich borocarbonitride (BCN, ~70% selectivity 38 ), B, N‐codoped carbon (B,N–C, ~80%–95% selectivity 39 ), oxygenated boron‐doped carbon (O–BC, ~80%–96% selectivity 40 ), and N, O codoped carbon (NO–C, ~80% selectivity 41 ). Although many electrocatalysts have higher H 2 O 2 selectivity, their E onset , including edge‐rich carbon materials (edge‐rich carbon, ~91%–94%, E onset ≈ 0.70 V 35 ) and single Mo atoms on O, S co‐doped carbon (Mo–OS–C, over 95%, E onset ≈ 0.73 V 5 ), is lower than those of our BN‐C‐1 (86%‐95%, E onset ≈ 0.79 V), as shown in Figure 3F.…”

CO2 Laser‐Induced Graphene with an Appropriate Oxygen Species as an Efficient Electrocatalyst for Hydrogen Peroxide Synthesis

“…We also compared the H 2 O 2 selectivity between LIG‐30 and many reported electrocatalysts (Figure 3f) including many metal‐based electrocatalysts: atomic‐level tuning single Co atoms dispersed on N doped carbon (Co−N−C) with below 80 % selectivity, [46] CoS 2 with ∼70 %‐80 % selectivity, [6] single atom Pd on oxidized carbon (Pd−O−C) with ∼100 % selectivity, [47] Fe atomically dispersed on CNTs (Fe−C−O) with ∼79–92 % selectivity, [48] single Co atoms dispersed on N doped carbon (Co‐N x ‐C) with ∼78–83 % selectivity, [12] single Mo atoms on O, S co‐doped carbon (Mo‐OS−C) with over 95 % selectivity, [10] single Al atoms dispersed on oxygen‐rich carbon (Al−O−C) with ∼95 % selectivity; [11] many carbon‐based electrocatalysts: edge rich carbon with ∼91 %‐94 % selectivity, [18] oxidized CNTs with ∼84 %‐88 % selectivity, [15] boron nitride islands doped carbon materials (BN−C) with ∼72–87 % selectivity [13] . B‐rich borocarbonitride (BCN) with ∼70 % selectivity, [49] B, N‐codoped carbon (B,N−C) with ∼80–95 % selectivity, [50] oxygenated boron‐doped carbon (O‐BC) with ∼80 %‐96 % selectivity, [51] N,O co‐doped carbon (NO−C) with ∼80 % selectivity [52] . The LIG‐30 has over 85 % selectivity in the range of 0.3–0.6 V vs. RHE.…”

“…[13] B-rich borocarbonitride (BCN) with ~70 % selectivity, [49] B, N-codoped carbon (B,NÀ C) with ~80-95 % selectivity, [50] oxygenated boron-doped carbon (O-BC) with ~80 %-96 % selectivity, [51] N,O co-doped carbon (NOÀ C) with ~80 % selectivity. [52] The LIG-30 has over 85 % selectivity in the range of 0.3-0.6 V vs. RHE. Compared to the above metal-based electrocatalysts, the LIG-30 shows lower selectivity while has higher selectivity than most of reported carbon-based electrocatalysts.…”